I had a smaller diameter of this product for a different lens, so when I got my new lens the first thing I bought was this ND filter. It is incredible. And this one had little dots along the edge, as well as text that read "Min" and "Max". This was super helpful. My only complaint about the smaller ones was that you couldn't tell how far was the maximum and minimum, and this model has solved that issue. I don't go anywhere without this filter. I will be buying a K&F Variable ND filter for every lens that I get from now on.

I'm thrilled ... I think the combination of ND and polarizing filters is brilliant; the brand and this idea made me buy it. the polarizing filter works perfectly Well - I would buy it again; Especially with water photography, this filter serves two purposes, which triggers some fascination in me

I occasionally carried a few individual filters with me. But it was often too time-consuming for me to mess around with it in nature. Screwing the filters on top of each other in order to get further adding gradations is fiddly. There are enough individual ND filters, but each time you had to change the filter again...

With this filter here you basically cheat the whole handling. I wasn't even aware that something like this existed. Therefore I have attached a small video so that you can see the function. Even if there is "only" ND2-32 here, you can see what these products can do.
A matter of seconds, especially for experimenting, sometimes using a different filter setting. With low filter strengths, the camera automatic is sufficient and you can see the current exposure time when adjusting the filter if ISO is fixed. In this way, soft water structures can be created in relatively bright light, or soft clouds in the sky, etc.pp. I didn't really notice scattered lights or reflections, but I work on that on the PC anyway.

The price for this product is high, but considering that this covers several filters, again not too bad. However, the general question is what kind of filter do you really need. I previously had an ND8 and an ND1000. Sometimes an ND 4000 would have been required (to safely create "deserted" objects/places).

Nevertheless, I find the concept here really innovative and practical.

I had a few individual filters with me occasionally. But it was often too expensive for me to fiddle with it in nature. Screwing the filter together to obtain further adding gradations is also fiddly. There are enough individual ND filters, but each time you had to change the filter again...

With this filter here, you basically trick the entire handling process. I hadn't even found out that there was such a thing. That's why I've included a small video so that you can see the function. Even though “only” ND2-32 is available here, you can still see what these products can do.
Especially for experimenting, a matter of seconds, sometimes using a different filter setting. With low filter strengths, the automatic camera is also sufficient and you can see the current shutter speed when adjusting the filter. In this way, soft water structures can be created with relatively bright light or soft clouds in the sky, etc.pp. I didn't really notice stray lights or reflections, but I'm reworking something like that on a PC anyway.

The price of this product is high, but considering that it covers several filters at once, it's not too bad. However, the general question is what kind of filters do you really need. I've had an ND8 and an ND1000 so far. Sometimes an ND 4000 would have been required (to safely create “deserted” objects/spaces).

However, I find the concept here really innovative and practical.

Good Quality no damage upon shipping. I love the effects! Must buy.

As a photographer I really try to make sure I only use reliable equipment. K&F has done a great job of being a reliable budget camera gear company. I have some of their other gear and continue to be impressed by their commitment to superior build quality and attention to detail in their products. I found the filter screwed directly onto my lens with no problem and was able to remove it with ease as well. Unfortunately I couldn't shoot a long exposure as I don't live near a waterfall and when I got this filter the weather really didn't cooperate with me. However, I held the filter to the lens without screwing it onto the lens, so I could see the difference between the image with the filter and the other. This type of test allows you to clearly identify a correctly exposed image and a slightly hazy image by showing only the "hot spots" of light in the photo. I took a few photos with the filter installed and found that there is no edge vignetting and as the glass is high quality I didn't notice any ghosts either. Overall, this is a very good option for a budget ND lens filter. that there is no edge vignetting and since the glass is of high quality I did not notice any ghosts either. Overall, this is a very good option for a budget ND lens filter. that there is no edge vignetting and since the glass is of high quality I did not notice any ghosts either. Overall, this is a very good option for a budget ND lens filter.

I simply copied the complete text from my YouTube video for you. Who wants to see the video
"Variable Nano X Slim ND Filter I pure waste of money when buying?" Enter on YouTube...It's ND Filter that's hard to beat for value for money. It's about a filter from the company K&F Concept, this manufacturer's name is actually familiar to everyone who is - a bit - at home in the photo and film segment. And K&F Concept also stands for quality.
It's about the filter called NANO X Slim Filter. It is offered from a 37mm thread and goes up to a 86mm thread. Thus, it covers almost all offered lenses. He weighs just --- 45gr.
He has a total of 5 f-stops, it starts at ND2, 4, 8, 16 and ND32.
The filter comes with a nice round packaging as a transport box, so that it can also be safely stowed in a backpack or bag. But what is most important, especially for those who always leave the filter on the lens ---like me--- is the fact that glass is the filter's scratch resistant.
Screwing it on and off is wonderfully easy. If you buy it, you should definitely note that you can then usually no longer use your lens hood. Because the thread size on the front lens changes. Attention, however, when buying sun visors - it is essential to pay attention to the zoom range in which the lens is and accordingly buy a sun visor. Of course, I also had to buy a new sun visor, which I bought first was from 24mm, not intended for wide angle. My lens was 17mm – 28mm though. When I was completely in the zoon out, on 17mm, I had nice black edges in the picture. --- Stupid beginner mistake stop. So be sure to pay attention to the zoom area covered by the sun visor before you buy, just as a little tip.
The ND filter can be set very easily to the different ND levels and the individual levels are very well marked, so that you always know exactly which level you are at. Changing the ND levels is so easy because the filter is slightly corrugated all around and has a small pleasant resistance when turning.
In some recessions I've seen that some say the filters would appear to produce X-patterns at high f-stops. What I can't confirm with my film work at first. There is a spin stop, and no overlap, when setting ND16 to ND32, so the X doesn't actually show up. I only have the filter for filming, I'm a videographer, not a photographer, and I think it does a great job. A photographer and a full professional filmmaker will probably not use a variable ND filter anyway. I film a lot at f1.4, f2.0 and 2.8 and shutter 1/50 and even there, although everything is very open glare, the filter comes through perfectly, and very well with. Unfortunately, and that would actually be the only thing you could complain about, is that the filter has no IR cut. In plain language, --- IR, --- means infrared blocking filter. This blocking filter blocks wavelengths in the infrared range. What this filter does not have. But at the price?? somehow also understandable.
What does an ND filter actually do? ...
If some should ask themselves that.
Quickly and roughly explained ---- little basic knowledge.
First and foremost, an ND filter reduces the incidence of light and so you can still film in very bright situations, for example. Without totally overexposing the recordings. So also a longer eg. shutter speed possible. Who doesn't know the great pictures of streams or waterfalls, where the water looks like a veil, like in a dream world. You get that with a good ND filter and exposure time, for example, and not, as some people think or suspect, with good Photoshop skills.
I work a lot on the water, on the beach, on the sea, and that's how I always get the water nice and smooth.

I'm thrilled...I find the combination of ND and polarizing filters brilliant; the brand and this idea made me buy it. the polarizing filter works perfectly ... although caution is advised in the extreme position (shadows are placed somewhat unevenly across the image; the image should always be checked anyway). I find it a bit unfortunate (but probably just logical) that the polarization effect varies again when close the ND filter after adjusting the polarizing filter. So the order will have to be: First set the ND filter (at the little handles), then the polarizing filter (with the help of the lens wheel) - hoping that the polarizing effect is still clearly visible in the viewfinder despite the darkening... Well - I would buy again; especially for water photography, not too narrow, this filter serves two purposes,